A. Chemical
B. Electrochemical
C. Both A. & B.
D. Neither A. nor B.
Related Mcqs:
- Which of the following metals in not used for coating of the base metal to guard it against corrosion ?
A. Lead
B. Cadmium
C. Magnesium
D. Aluminium - Which of the following is the most prone to atmospheric corrosion ?
A. Silver
B. Iron
C. Tin
D. Copper - Corrosion resisting properties of cast iron are significantly improved by the addition of 12 – 15% of___________________?
A. Tungsten
B. Vanadium
C. Silicon
D. All A., B. & C. - The process of coating steel sheets by zinc to improve its corrosion resistance is called___________________?
A. Calorising
B. Galvanising
C. Zincification
D. Tempering - Atmospheric corrosion of metals result from their________________?
A. Slow oxidation
B. Fast oxidation
C. Fast hydration
D. Slow dehydration - Most common stainless steel type 316, which is highly resistant to corrosion contains______________?
A. 16-13% Cr 10-14% Ni and 2-3% Mo
B. 20-22% Cr, and 8-10% Ni
C. 2-4% Cr, 22% NI and 2-4% Mo
D. None of these - _____________ is added in stainless steel to prevent inter crystal corrosion?
A. Vanadium
B. Niobium
C. Chromium
D. Nickel - The most resistant material to alkaline corrosion is____________________?
A. Duriron
B. Nickel
C. Aluminium
D. Karbate - Corrosion resistance of steel is increased by the addition of_________________?
A. Phosphorous and tungsten
B. Nickel and chromium
C. Lead and vanadium
D. Molybdenum and tungsten - Cast iron and steel pipes are produced by ____________ casting?
A. Die
B. Investment
C. Slush
D. True centrifugal
